Roof Appears Wavy

It is not uncommon for a new roof to look a bit wavy until this permanent seal is created.

Roof appears wavy.

Despite the roof being sized and installed in accordance with the building code waviness between framing members may occur. If you have recently had a roof installed and it has started to look wavy there are the possibilities. The felt paper used on the decking was potentially wet or bubbly when laid down. When heated by the sun the strip will cause the shingles to lay down and bond together.

Let s take a look at some of the typical causes of a wavy shingles especially after a new roof is installed. Frost outline on sheathing joints and over roof framing members. A layer of felt paper acts as a base and goes down before the shingles for every installation. Shingles not sealing most asphalt shingles have an adhesive strip.

Underlayment is what we call the product placed between the decking and and the shingles. This will not affect the performance of the roof. Having wet or poorly placed felt paper under your shingles can cause your roof to be wavy. The carpenter may have failed to put all of the crowns up on site framed roofs.

When referring to asphalt shingles felt paper is what is typically used in this application. This type of roof wave is usually only seen after a new installation. If the material was damp if the day was humid or the paper bubbled a bit if could produce a wavy appearance on your new roof. Frost patterns on a roof can give the appearance of waviness without the condition existing e g.

Poor framing practice is one of the more common reasons for roof waviness. When some of the crowns are up and some are down then the roof has a wavy look but it is still structurally sound.